Simulation of energy spectra of slow He+ ions scattered from a copper surface

Khalal-Kouache, K.; Primetzhofer, Daniel; Bauer, Péter

doi:10.1016/j.nimb.2011.04.002

Cited by 2 publications

(1 citation statement)

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“…When the width of a backscattering spectrum is evaluated, all contributing projectiles have experienced similar violent collisions; therefore, the width of the spectrum should not depend significantly on impact parameter dependent inelastic losses. Note that for He scattered from polycrystalline Cu it was possible to quantitatively reproduce the energy spectrum in a wide energy range including the surface peak by a Monte Carlo (MC) simulation, which includes only multiple elastic collisions and electronic stopping along the trajectory [27]. It is, however, still an open question whether impact parameterdependent inelastic losses are responsible for the observed major discrepancies between electronic stopping data deduced from TR and BS experiments [4,6,7,28].…”

Section: Transmission Versus Backscatteringmentioning

confidence: 99%

Energy loss of low-energy ions in transmission and backscattering experiments

et al. 2013

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The determination of the electronic stopping power for low-energy ions is an experimentally demanding task. In this paper we elaborate on the different effects of nuclear stopping and multiple scattering on the energy spectra for different experimental geometries, i.e., transmission through thin foils and backscattering from thin films. By calculating distributions of path lengths and scattering angles we demonstrate how electronic stopping, nuclear stopping, and multiple scattering add up to the total energy loss. We show that at low energies it is important to properly disentangle these effects to extract electronic stopping from the measured energy loss spectra.

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